Solid-state photoinduced luminescence switch and its advanced optical applications

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 377-378
• 页数: 2页
• 语种: 英文

摘要

Spiropyran (SP) and its derivatives were one of the earliest and most extensive systems in organic photochromic materiais.Generally,the distinct absorption changes will occur during the structural isomerization from SP to merocyanine (MC) when the molecule is exposed to the ultraviolet radiation [1].In the past decades,many researchers have focused on the combination of fluorophore and spiropyran to realize multi-color luminescence modulation,leading to the development of innovative functional materials with photoresponsive characteristics.However,most of these switches function only in the solution phase.Comparing with the common photoswitches in solution,solid-state photoswitches have been rarely reported.The primary challenge in the solid-state photoswitching of SP molecules concerns tight molecular packing in aggregation state.Such tight molecular packing severely impedes the cis-trans transformation,which occurs during photochemical reactions between the SP and MC forms.Thus,developing efficient solid-state luminescent photoswitches has been a significant challenging in the field of chemistry and materials science and at the same time increasingly imperative for practical applications.